Card validation

extension ViewController: AccessCheckoutCardValidationDelegate {

    // This event handler is notified when the card brand detected by the SDK has changed
    func cardBrandsChanged(cardBrands: [CardBrand]) {
        // The cardBrands list may contain one brand, or multiple brands for a co-branded card
        // CardBrand objects contains a name and optionally an array of of image objects
        // with a URL and a type (either image/png or image/svg+xml)

        // You might want to display the brand name of the first card brand returned
        // or in the case of a co-branded card, you may want to prompt shoppers with a choice
        // of brands to pay with

        // Don't forget to use the UI thread to update your views
    }

    // This event handler is notified when the PAN becomes valid or invalid
    func panValidChanged(isValid: Bool) {
        // You might want to change the text color
        panAccessCheckoutView.textColor = isValid ? nil : UIColor.red

        if !valid {
            // You might want to disable a submit button which would normally be clicked on when all fields are valid
            submitButton.isEnabled = false
        }
    }

    // This event handler is notified when the expiry date becomes valid or invalid
    func expiryDateValidChanged(isValid: Bool) {
        // You might want to change the text color
        expiryDateAccessCheckoutView.textColor = isValid ? nil : UIColor.red

        if !valid {
            // You might want to disable a submit button which would normally be clicked on when all fields are valid
            submitButton.isEnabled = false
        }
    }

    // This event handler is notified when the CVC becomes valid or invalid
    func cvcValidChanged(isValid: Bool) {
        // You might want to change the text color
        cvcAccessCheckoutView.textColor = isValid ? nil : UIColor.red

        if !valid {
            // You might want to disable a submit button which would normally be clicked on when all fields are valid
            submitButton.isEnabled = false
        }
    }

    // This event handler is notified when the PAN, expiry date and CVC are all valid
    func validationSuccess() {
        // You might want to enable a submit button when all fields are valid
        submitButton.isEnabled = true
    }
}

import AccessCheckoutSDK

class MyViewController: UIViewController {
    private let accessBaseUrl = "TARGET_BASE_URL"
    private let checkoutId = "YOUR_CHECKOUT_ID"

    @IBOutlet weak var panAccessCheckoutView: AccessCheckoutUITextField!
    @IBOutlet weak var expiryDateAccessCheckoutView: AccessCheckoutUITextField!
    @IBOutlet weak var cvcAccessCheckoutView: AccessCheckoutUITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // other fields omitted

        do {
            // Initialize the AccessCheckoutClient
            let accessCheckoutClient = try AccessCheckoutClientBuilder()
                .accessBaseUrl(accessBaseUrl)
                .checkoutId(checkoutId)
                .build()

            // Create the validation configuration
            let validationConfig = try CardValidationConfig.builder()
                .pan(panAccessCheckoutView)
                .expiryDate(expiryDateAccessCheckoutView)
                .cvc(cvcAccessCheckoutView)
                .validationDelegate(self)
                .build()

            // Initialize validation using the client
            accessCheckoutClient.initialiseValidation(validationConfig)
        } catch {
            // Handle initialization error (e.g., log or show alert)
        }
    }
}

let validationConfig = try! CardValidationConfig.builder()
    ...
    .acceptedCardBrands(["visa", "mastercard", "AMEX"])
    ...
    .build()

let validationConfig = try! CardValidationConfig.builder()
    ...
    .enablePanFormatting()
    ...
    .build()